[luisguzman-adfa]

What changes

• The pre-build belt runs the k2go-box-identity unit tests (static/box-identity, stdlib only).

Why

• The bake ships k2go-box-identity, but CI did not run its tests. A regression now stops the bake.

Verifications

• 9 tests pass locally on main + K2GO-560 fix(copy): a cloned or restored box makes its own identity and carries no records #756.
• Coordination: merge after K2GO-560 fix(copy): a cloned or restored box makes its own identity and carries no records #756 (it adds test_k2go_box_identity.py).

Notes

• Keyed to K2GO-567 (pre-build test belt).